Hello,

Can anyone tell me what the factory needle settings on a Go 21 7 port are ?

Also how many head shims should engine come with ? Mine had 2 brass shims.

My engine is running well but seemingly a little hot. In 260 - 270 range after a race. Richening causes unsatisfactory power and im pretty sure im not too lean as I get a fair bit more performance still when i lean it further. Im pretty sure I have no air leaks so wondering if adding a shim might bring temps down a bit or if it shoudl just not care becuase the engine is running great. I am running a Go no 5 plug and Massive Mods 25% fuel.